<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>function::ftrace</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="SystemTap Tapset Reference Manual"><link rel="up" href="ch15.html" title="Chapter 15. Logging Tapset"><link rel="prev" href="re231.html" title="function::error"><link rel="next" href="ch16.html" title="Chapter 16. Random functions Tapset"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>function::ftrace</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re231.html">Prev</a> </td><th width="60%" align="center">Chapter 15. Logging Tapset</th><td width="20%" align="right"> <a accesskey="n" href="ch16.html">Next</a></td></tr></table><hr></div><div class="refentry" title="function::ftrace"><a name="API-ftrace"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>function::ftrace —
Send a message to the ftrace ring-buffer.
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><pre class="programlisting">
ftrace(msg:string)
</pre></div><div class="refsect1" title="Arguments"><a name="id3135782"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>msg</code></em></span></dt><dd><p>
The formatted message string.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a name="id3135808"></a><h2>Description</h2><p>
If the ftrace ring-buffer is configured & available,
see /debugfs/tracing/trace for the message. Otherwise, the
message may be quietly dropped. An implicit end-of-line is added.
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